ADC on ESP32-P4 ? (IDFGH-16868)

[f-hoepfinger-hr-agrartechnik]

ADC2 and Wifi was a Problem on ESP32-S3.

https://github.com/espressif/esp-idf/tree/master/examples/peripherals/adc/continuous_read

now, P4 has no Wifi, is it safe to use all ADCs ?

[f-hoepfinger-hr-agrartechnik]

Reverse Question:

i need 8 ADC Channels.

would you use 4 from ADC1, and 4 from ADC2,
or better use the 8 Channels on ADC1, as i would do on a S3,
and let the ADC2 switched off ?

Tnx.

[ginkgm]

I think both of them are OK. There are no restrictions from RF side. Except from a bit of influence on the RNG performance when using continuous mode:

https://docs.espressif.com/projects/esp-idf/en/latest/esp32p4/api-reference/peripherals/adc/adc_continuous.html#hardware-limitations

See also: comparison among chips:

https://developer.espressif.com/blog/2025/08/adc-performance/#adc-performance-comparison-among-socs